NullPointerException at ADFBindingFilter.destroy(ADFBindingFilter.java:111)

Question

Hi
thank you for reading my post
can some one please explain why this error happens ?
i deployed that adf faces + bc application on tomcat and now when ever we stop the application it return this exception and does not start until the whole tomcat restart.
can some one please tell me how i can resolve it ?
here is the exception
SEVERE: HTMLManager: ManagerServlet.stop[tapp]
java.lang.NullPointerException
     at oracle.adf.model.servlet.ADFBindingFilter.destroy(ADFBindingFilter.java:111)
     at org.apache.catalina.core.ApplicationFilterConfig.release(ApplicationFilterConfig.java:255)
     at org.apache.catalina.core.StandardContext.filterStop(StandardContext.java:3635)
     at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4336)
     at org.apache.catalina.manager.ManagerServlet.stop(ManagerServlet.java:1226)
     at org.apache.catalina.manager.HTMLManagerServlet.stop(HTMLManagerServlet.java:545)
     at org.apache.catalina.manager.HTMLManagerServlet.doGet(HTMLManagerServlet.java:106)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:524)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
     at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
     at java.lang.Thread.run(Unknown Source)

Answer 1

Hello,
I ran into exactly the same problem. After some source analysis i found that there is just a bug.
public void init(FilterConfig filterConfig) throws ServletException
if (JboEnvUtil.inOC4J())
mOC4JContextRef = new WeakReference(ADFContext.getCurrent().getApplication().getId());
public void destroy()
mFilterConfig = null;
Object context = null;
if ((context = mOC4JContextRef.get()) != null)
BindingRequestHandler.destroyApplication(context);
mOC4JContextRef = null;
So, it looks like mOC4JContextRef attribute doesn't get initialized if its not oc4j environment, while destroy method thinks that it will never be null.
As a temporary workaround you can write your own Filter which extends ADFBindingFilter and overrides "destroy" method, which doesn't do anything very special anyway.